[Bug 65141] New: Blank screen after resume with radeon driver

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=65141

            Bug ID: 65141
           Summary: Blank screen after resume with radeon driver
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.7,3.11,3.12
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: tiwai@suse.de
        Regression: No

Created attachment 115031
  --> https://bugzilla.kernel.org/attachment.cgi?id=115031&action=edit
dmesg output with drm.debug=0x0e

Reported at openSUSE bugzilla
    https://bugzilla.novell.com/show_bug.cgi?id=841822

The original bug report:

Toshiba P775D-S7230 AMD APU A4, resume from suspend leaves screen "black".

WHen I compiled and installed the proprietary AMD driver (13.8B2), it works
fine.  Same behavior on 12.3 as well.

Reproducible: Always

Steps to Reproduce:
1.  Make sure AMD FOSS driver is loaded
2.  Suspend (to ram or disk)
3.  Resume
4.  Screen is blank, machine is "resumed"
Actual Results:  
The machine appears to be in a working state, but the screen is black

Expected Results:  
Full function resume from suspend with video

Compiling and installing the AMD proprietary driver (13.8B2) works.

===

The problem is seen without X, too.

Reproduced on (openSUSE) 12.3 means that kernel 3.7 had already the problem.
openSUSE 13.1 uses 3.11.x kernel, and the reporter tested 3.12 kernel, too.

The full dmesg with drm.debug=0x0e after S4 resume is attached.

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